Sorry I'm not fully sure, but It is best that you keep it at how it is currently ! But I do Recommend that when the voting period ends diffidently do man !
Viewing post in Jamming Chipper jam comments
This jam doesn't say anything about updates during the voting period, but according to the itch.io automatically-enforceable rules, it should be allowed:
Participants are free to update their submission page design and content while their files are locked.